Set DEBIAN_MIRRORSITE by debconf in /etc/pbuilderrc
DISTRIBUTION_BASE is used for debootstrap
All distribution codename and mirror URL definition are in pbuilderrc.
eval "case ... esac" construct requires annoying \" in it.

Fix get_dep_op_and_ver() to not output anything when there is no version
and to deal with spaces between version and closing parenthesis.

pbuilder-satisfydepends-classic: Use functions to avoid code duplication
and make the logic more readable.  This also allows testing.

Make pbuilder-satisfydepends-aptitude and -classic relocatable.

Replace cat + awk + sed in get_control_re() with a sed script; rename
the function to get_source_control_field.

Set BINARY_ARCH in pbuilder-satisfydepends-checkparams just as in
pbuilder-checkparams instead of setting BC_REGEXP and BD_REGEXP and
change get_build_deps and get_build_conflicts to query for Build-Deps /
Build-Conflicts only, with an optional separate get_control_re call for
the -Indep deps if needed.  Update testsuite to also test for
build-deps-indep.

package_versions(): drop useless subshell; pipes are already run in a
subshell.  Also add LC_ALL=C for consistency when parsing output of
commands.

package_versions(), candidate_version(): cleanup regexp

Add get_build_deps() and get_build_conflicts() functions wrapping
get_control_re() for BD_REGEXP and BC_REGEXP over DEBIAN_CONTROL.

test_pbuilder-satisfydepends-funcs: trap exit to run a cleanup()
function; this avoid leaving files behind if the script is killed at the
wrong time.

test_pbuilder-satisfydepends-funcs: Rename CONTROL to DEBIAN_CONTROL as
to use the same var for all get_control_re calls.

This reverts commit c4ab4315.  apt does
not have to be Build-Essential: yes since e.g. sbuild installs packages
with host tools and installation of build-deps does not need to happen
with build-essential packages anyway.  Installation of apt was fixed in
4a573bcd.

debuild-pbuilder: Don't quote PBUILDERROOTCMD as it's typically a
command with arguments such as "su -p" or "sudo -E"; thanks Osamu Aoki;
see #563209.

debuild-pbuilder.1: update sample output of debuild-pbuilder to match
current code; thanks Osamu Aoki; closes: 563209.

Add builtin support for using ccache in pbuilder and enable it by
default.  Ship a new /var/cache/pbuilder/ccache dir and bind-mount and
chown it to BUILDUSERID at build time.  Install/remove ccache
automatically on create/update if CCACHEDIR is set/unset.  Update docs
and remove old ccache config example.  Add a NEWS entry featuring the
change.

Remove aptitude with apt-get install aptitude- and note that we should
use apt-get to remove REMOVEPACKAGES in the future.

Only install aptitude in pbuilder-createbuildenv or
pbuilder-updatebuildenv, not in pbuilder-satisfydepends-aptitude, and
only when $PBUILDERSATISFYDEPENDSCMD uses aptitude.  Remove aptitude in
pbuilder-createbuildenv and pbuilder-updatebuildenv otherwise;
closes: #539578.